feat: implement EventTarget for worker scope (#4737)

1 files changed, 43 insertions, 0 deletions

diff --git a/cli/tests/subdir/event_worker_scope.js b/cli/tests/subdir/event_worker_scope.js
new file mode 100644
index 000000000..0381801a8
--- /dev/null
+++ b/cli/tests/subdir/event_worker_scope.js
@@ -0,0 +1,43 @@
+let messageHandlersCalled = 0;
+let errorHandlersCalled = 0;
+
+onmessage = function (e) {
+  if (e.data === "boom") {
+    throw new Error("boom error!");
+  }
+  messageHandlersCalled++;
+};
+
+self.addEventListener("message", (_e) => {
+  messageHandlersCalled++;
+});
+
+self.addEventListener("message", (_e) => {
+  messageHandlersCalled++;
+});
+
+self.addEventListener("message", (_e) => {
+  messageHandlersCalled++;
+
+  postMessage({
+    messageHandlersCalled,
+    errorHandlersCalled,
+  });
+});
+
+onerror = function (_e) {
+  errorHandlersCalled++;
+};
+
+self.addEventListener("error", (_e) => {
+  errorHandlersCalled++;
+});
+
+self.addEventListener("error", (_e) => {
+  errorHandlersCalled++;
+});
+
+self.addEventListener("error", (e) => {
+  errorHandlersCalled++;
+  e.preventDefault();
+});